I love this version of Willy Wonka and the Oompa Loompa. These were winners at the Sequoia Zoo costume party. I got these pics from their FB page. Wish I could have been there, these are awesome costumes. So, how you can make this costume yourself?
WONKA: First, the purple velour jacket could be a thrift store find with added trim. Second, you can use this vest pattern to create the purple floral on black vest. Any regular khakis pants along with black dress shoes. Watch this video to learn how to tie a big Tan Victorian Bow tie. Finally, follow this tutorial on deviantart to create a real gentleman’s top hat. You could also make it a paper hat.
Oompa Loompa: Get or make white, fleece overalls. Get a brown turtleneck then paint white stripes at the top. Spray paint a wig green, paint the face orange and make white eyebrows. Follow the instructions on Coolest Homemade Costumes for her step-by-step instructions.
If you have a bigger group and want more Charlie and the Chocolate Factory cast members here are the other costumes.